Moriarti .50 Beowulf 10.5" AR-15 Upper Assembly – Black Diamond Cut M-LOK, A2 Flash Hider

.50 Beowulf Upper: Specs & Features

The Moriarti .50 Beowulf 10.5" AR-15 Upper Assembly features a heavy-profile 4150 Chrome Moly Vanadium barrel with a Parkerized finish, a black 10-inch Diamond Cut M-LOK free-float handguard, and a .50-caliber A2-style flash hider.

Chambered in 12.7×42mm (.50 Beowulf), the 10.5-inch non-fluted barrel features a 1:20 twist rate, single feed ramp, pistol-length gas system, and .936-inch gas block journal. The barrel uses 49/64×20 muzzle threads.

The all-black configuration combines a forged 7075-T6 aluminum flat-top upper receiver with a black Diamond Cut M-LOK handguard. The upper receiver features an enlarged ejection port for the large-diameter cartridge.

The bolt carrier group and charging handle are available as optional selections.

Key Features

• 10.5" heavy-profile 4150 CMV barrel

• Parkerized barrel finish

• 1:20 twist rate

• Non-fluted barrel

• Single feed ramp

• Pistol-length gas system

• .936" gas block journal

• 49/64×20 muzzle threads

• .50-caliber A2-style flash hider

• 10" black Diamond Cut M-LOK free-float handguard

• Forged 7075-T6 aluminum flat-top upper receiver

• Enlarged big-bore ejection port

• All-black configuration

• Optional bolt carrier group and charging handle

Specifications

Package Includes

• One assembled .50 Beowulf 10.5" upper

• Installed black 10" Diamond Cut M-LOK handguard

• Installed .50-caliber A2-style flash hider

• Installed gas system

• Bolt carrier group only when selected

• Charging handle only when selected

Lower receiver, magazine, and ammunition are not included.

Frequently Asked Questions

What caliber is this upper assembly chambered in?

The upper is chambered in 12.7×42mm, commonly known as .50 Beowulf.

What barrel does this upper use?

It features a 10.5-inch heavy-profile, non-fluted 4150 CMV barrel with a Parkerized finish, 1:20 twist rate, single feed ramp, and pistol-length gas system.

What muzzle device is installed?

The upper features a .50-caliber A2-style flash hider configured for 49/64×20 muzzle threads.

Is the handguard available in different colors?

No. This configuration features a black 10-inch Diamond Cut M-LOK handguard and black upper receiver.

Are the bolt carrier group and charging handle included?

Both components are optional and included only when selected.

Product Image Notice

Images may not be the exact representation of the product.

More Questions

Will this upper fit my AR-15 lower?

Yes. It fits a standard mil-spec AR-15 lower receiver.

What bolt and magazines do I need?

A dedicated .50 Beowulf bolt carrier group. It feeds from standard AR-15 magazines in a single stack, so capacity is lower than with 5.56.

Do I need a heavier buffer?

A heavy buffer is recommended for proper cycling with big-bore loads.

What twist rate does it use?

A 1:20 twist, the standard rate for .50 Beowulf.

Related: .50 Beowulf uppers · all AR-15 upper assemblies